<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>v-bind指令</title>
    <style>
        .active{
            border: 1px solid red;
        }
    </style>
</head>
<body>
    <div id="app">
        <img v-bind:src="imgSrc" alt="">
        <br>
        <img :src="imgSrc" alt="" :title="imgtitle+'!!!'"
        :class="isActive?'active:''" @click="toggleActive">
        <br>
        <img :src="imgSrc" alt="" :title="imgtitle+'!!!'"
        :class="{active:isActive}" @click="toggleActive">
     
    </div>
         <!-- 开发环境版本，包含了有帮助的命令行警告 -->
         <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"> </script>

         <script>
         var app = new Vue({
         el: '#app',
          data: {
           imgSrc:"./img/houzi.jpg",
           imgtitle:"黑马程序员",
           isActive:false
    },
        methods:{
            toggleActive:function(){
                this.isActive=!this.isActive;
            }
        }
    })
     </script>
</body>
</html>